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Brass WWVB Clock Dial: 6-1/8". Base: 8-13/16". Depth: 1-7/8". |
Radio Control Clocks
Nothing is measured more precisely than time!
Since the beginning of time, man has been fascinated with the measurement of
time and has devised more accurate machines to trap and measure time. Today,
time is precisely controlled in the United States by the most accurate clock in
North America, the atomic clock of the US National Institute of Standards and
Technology, Time and Frequency Division in Boulder, Colorado.
A Team of atomic physicists continually measures every second of every day to an
accuracy of ten billionths of a second per day. These physicists have created an
international standard, measuring a second as 9,192,631,770 vibrations of a
cesium 133 atom in a vacuum. This atomic clock regulates the WWVB radio
transmitter located in Fort Collins, Colorado, where the exact time signal is
continuously broadcast throughout the United States at 60 kHz to take advantage
of stable longwave radio paths found in that frequency range. Radio waves at
these low frequencies use the earth and the ionosphere as a wave-guide and
follow the curvature of the earth for long distances.
The built-in antenna system will receive the WWVB signal anywhere in North
America where long-wave reception is undisturbed. A microprocessor activates the
receiver and process the time signal from Fort Collins overnight. Even
adjustment for daylight savings time, and leap second are automatic.
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Brass WWVB Clock This traditional looking clock is housed in a brilliant polished brass case, lacquered to keep its shine for many years to come. To set up your Weems & Plath radio control clock insert a AA battery, select your time zone with the clearly marked knob, and then hang it on the wall, the clock will then set itself to the exact time. Each instrument is provided with complete instructions, mounting hardware, lifetime warranty, and a fresh battery. Wt. 19.4 oz. 552000 Brass WWVB Clock |
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Keywords: Weems, &, Plath:, Brass, WWVB, Clock